## Update Agent

`$ ant beta:agents update`

**post** `/v1/agents/{agent_id}`

Update Agent

### Parameters

- `--agent-id: string`

  Path param: Path parameter agent_id

- `--version: number`

  Body param: The agent's current version, used to prevent concurrent overwrites. Obtain this value from a create or retrieve response. The request fails if this does not match the server's current version.

- `--description: optional string`

  Body param: Description. Omit to preserve; send empty string or null to clear.

- `--mcp-server: optional array of BetaManagedAgentsURLMCPServerParams`

  Body param: MCP servers. Full replacement. Omit to preserve; send empty array or null to clear. Names must be unique. Maximum 20.

- `--metadata: optional map[string]`

  Body param: Metadata patch. Set a key to a string to upsert it, or to null to delete it. Omit the field to preserve. The stored bag is limited to 16 keys (up to 64 chars each) with values up to 512 chars.

- `--model: optional BetaManagedAgentsModelConfigParams`

  Body param: Model identifier. Accepts the [model string](https://platform.claude.com/docs/en/about-claude/models/overview#latest-models-comparison), e.g. `claude-opus-4-6`, or a `model_config` object for additional configuration control. Omit to preserve. Cannot be cleared.

- `--multiagent: optional object { agents, type }`

  Body param: A coordinator topology: the session's primary thread orchestrates work by spawning session threads, each running an agent drawn from the `agents` roster.

- `--name: optional string`

  Body param: Human-readable name. Must be non-empty. Omit to preserve. Cannot be cleared.

- `--skill: optional array of BetaManagedAgentsSkillParams`

  Body param: Skills. Full replacement. Omit to preserve; send empty array or null to clear.

- `--system: optional string`

  Body param: System prompt. Omit to preserve; send empty string or null to clear.

- `--tool: optional array of BetaManagedAgentsAgentToolset20260401Params or BetaManagedAgentsMCPToolsetParams or BetaManagedAgentsCustomToolParams`

  Body param: Tool configurations available to the agent. Full replacement. Omit to preserve; send empty array or null to clear. Maximum of 128 tools across all toolsets allowed.

- `--beta: optional array of AnthropicBeta`

  Header param: Optional header to specify the beta version(s) you want to use.

### Returns

- `beta_managed_agents_agent: object { id, archived_at, created_at, 12 more }`

  A Managed Agents `agent`.

  - `id: string`

  - `archived_at: string`

    A timestamp in RFC 3339 format

  - `created_at: string`

    A timestamp in RFC 3339 format

  - `description: string`

  - `mcp_servers: array of BetaManagedAgentsMCPServerURLDefinition`

    - `name: string`

    - `type: "url"`

      - `"url"`

    - `url: string`

  - `metadata: map[string]`

  - `model: object { id, speed }`

    Model identifier and configuration.

    - `id: "claude-fable-5" or "claude-opus-4-8" or "claude-opus-4-7" or 8 more or string`

      The model that will power your agent.

      See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.

      - `"claude-fable-5"`

        Next generation of intelligence for the hardest knowledge work and coding problems

      - `"claude-opus-4-8"`

        Frontier intelligence for long-running agents and coding

      - `"claude-opus-4-7"`

        Frontier intelligence for long-running agents and coding

      - `"claude-opus-4-6"`

        Most intelligent model for building agents and coding

      - `"claude-sonnet-4-6"`

        Best combination of speed and intelligence

      - `"claude-haiku-4-5"`

        Fastest model with near-frontier intelligence

      - `"claude-haiku-4-5-20251001"`

        Fastest model with near-frontier intelligence

      - `"claude-opus-4-5"`

        Premium model combining maximum intelligence with practical performance

      - `"claude-opus-4-5-20251101"`

        Premium model combining maximum intelligence with practical performance

      - `"claude-sonnet-4-5"`

        High-performance model for agents and coding

      - `"claude-sonnet-4-5-20250929"`

        High-performance model for agents and coding

    - `speed: optional "standard" or "fast"`

      Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Not all models support `fast`; invalid combinations are rejected at create time.

      - `"standard"`

      - `"fast"`

  - `multiagent: object { agents, type }`

    Resolved coordinator topology with a concrete agent roster.

    - `agents: array of BetaManagedAgentsAgentReference`

      Agents the coordinator may spawn as session threads, each resolved to a specific version.

      - `id: string`

      - `type: "agent"`

        - `"agent"`

      - `version: number`

    - `type: "coordinator"`

      - `"coordinator"`

  - `name: string`

  - `skills: array of BetaManagedAgentsAnthropicSkill or BetaManagedAgentsCustomSkill`

    - `beta_managed_agents_anthropic_skill: object { skill_id, type, version }`

      A resolved Anthropic-managed skill.

      - `skill_id: string`

      - `type: "anthropic"`

        - `"anthropic"`

      - `version: string`

    - `beta_managed_agents_custom_skill: object { skill_id, type, version }`

      A resolved user-created custom skill.

      - `skill_id: string`

      - `type: "custom"`

        - `"custom"`

      - `version: string`

  - `system: string`

  - `tools: array of BetaManagedAgentsAgentToolset20260401 or BetaManagedAgentsMCPToolset or BetaManagedAgentsCustomTool`

    - `beta_managed_agents_agent_toolset20260401: object { configs, default_config, type }`

      - `configs: array of BetaManagedAgentsAgentToolConfig`

        - `enabled: boolean`

        - `name: "bash" or "edit" or "read" or 5 more`

          Built-in agent tool identifier.

          - `"bash"`

          - `"edit"`

          - `"read"`

          - `"write"`

          - `"glob"`

          - `"grep"`

          - `"web_fetch"`

          - `"web_search"`

        - `permission_policy: BetaManagedAgentsAlwaysAllowPolicy or BetaManagedAgentsAlwaysAskPolicy`

          Permission policy for tool execution.

          - `beta_managed_agents_always_allow_policy: object { type }`

            Tool calls are automatically approved without user confirmation.

            - `type: "always_allow"`

              - `"always_allow"`

          - `beta_managed_agents_always_ask_policy: object { type }`

            Tool calls require user confirmation before execution.

            - `type: "always_ask"`

              - `"always_ask"`

      - `default_config: object { enabled, permission_policy }`

        Resolved default configuration for agent tools.

        - `enabled: boolean`

        - `permission_policy: BetaManagedAgentsAlwaysAllowPolicy or BetaManagedAgentsAlwaysAskPolicy`

          Permission policy for tool execution.

          - `beta_managed_agents_always_allow_policy: object { type }`

            Tool calls are automatically approved without user confirmation.

          - `beta_managed_agents_always_ask_policy: object { type }`

            Tool calls require user confirmation before execution.

      - `type: "agent_toolset_20260401"`

        - `"agent_toolset_20260401"`

    - `beta_managed_agents_mcp_toolset: object { configs, default_config, mcp_server_name, type }`

      - `configs: array of BetaManagedAgentsMCPToolConfig`

        - `enabled: boolean`

        - `name: string`

        - `permission_policy: BetaManagedAgentsAlwaysAllowPolicy or BetaManagedAgentsAlwaysAskPolicy`

          Permission policy for tool execution.

          - `beta_managed_agents_always_allow_policy: object { type }`

            Tool calls are automatically approved without user confirmation.

          - `beta_managed_agents_always_ask_policy: object { type }`

            Tool calls require user confirmation before execution.

      - `default_config: object { enabled, permission_policy }`

        Resolved default configuration for all tools from an MCP server.

        - `enabled: boolean`

        - `permission_policy: BetaManagedAgentsAlwaysAllowPolicy or BetaManagedAgentsAlwaysAskPolicy`

          Permission policy for tool execution.

          - `beta_managed_agents_always_allow_policy: object { type }`

            Tool calls are automatically approved without user confirmation.

          - `beta_managed_agents_always_ask_policy: object { type }`

            Tool calls require user confirmation before execution.

      - `mcp_server_name: string`

      - `type: "mcp_toolset"`

        - `"mcp_toolset"`

    - `beta_managed_agents_custom_tool: object { description, input_schema, name, type }`

      A custom tool as returned in API responses.

      - `description: string`

      - `input_schema: object { type, properties, required }`

        JSON Schema for custom tool input parameters.

        - `type: "object"`

        - `properties: optional map[unknown]`

        - `required: optional array of string`

      - `name: string`

      - `type: "custom"`

        - `"custom"`

  - `type: "agent"`

    - `"agent"`

  - `updated_at: string`

    A timestamp in RFC 3339 format

  - `version: number`

    The agent's current version. Starts at 1 and increments when the agent is modified.

### Example

```cli
ant beta:agents update \
  --api-key my-anthropic-api-key \
  --agent-id agent_011CZkYpogX7uDKUyvBTophP \
  --version 1
```

#### Response

```json
{
  "id": "agent_011CZkYpogX7uDKUyvBTophP",
  "archived_at": null,
  "created_at": "2026-03-15T10:00:00Z",
  "description": "A general-purpose starter agent.",
  "mcp_servers": [
    {
      "name": "example-mcp",
      "type": "url",
      "url": "https://example-server.modelcontextprotocol.io/sse"
    }
  ],
  "metadata": {
    "foo": "bar"
  },
  "model": {
    "id": "claude-sonnet-4-6",
    "speed": "standard"
  },
  "multiagent": {
    "agents": [
      {
        "id": "agent_011CZkYqphY8vELVzwCUpqiQ",
        "type": "agent",
        "version": 1
      }
    ],
    "type": "coordinator"
  },
  "name": "My First Agent",
  "skills": [
    {
      "skill_id": "xlsx",
      "type": "anthropic",
      "version": "1"
    },
    {
      "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTlx",
      "type": "custom",
      "version": "2"
    }
  ],
  "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.",
  "tools": [
    {
      "configs": [
        {
          "enabled": true,
          "name": "bash",
          "permission_policy": {
            "type": "always_allow"
          }
        }
      ],
      "default_config": {
        "enabled": true,
        "permission_policy": {
          "type": "always_ask"
        }
      },
      "type": "agent_toolset_20260401"
    }
  ],
  "type": "agent",
  "updated_at": "2026-03-15T10:00:00Z",
  "version": 1
}
```